JP2019157605A - Buried object detection mechanism in drilling earth removal device and buried object detection method of the same - Google Patents

Buried object detection mechanism in drilling earth removal device and buried object detection method of the same Download PDF

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JP2019157605A
JP2019157605A JP2018063101A JP2018063101A JP2019157605A JP 2019157605 A JP2019157605 A JP 2019157605A JP 2018063101 A JP2018063101 A JP 2018063101A JP 2018063101 A JP2018063101 A JP 2018063101A JP 2019157605 A JP2019157605 A JP 2019157605A
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excavation
buried object
reaction force
cylindrical tube
inner pipe
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JP7017756B2 (en
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古部　悟
Satoru Furube
悟 古部
秀一 會澤
Shuichi Aizawa
秀一 會澤
友博 木村
Tomohiro Kimura
友博 木村
卓士 矢作
Takashi Yahagi
卓士 矢作
保 卯月
Tamotsu Uzuki
保 卯月
大輔 金子
Daisuke Kaneko
大輔 金子
義也 穴原
Yoshiya Anahara
義也 穴原
克巳 美馬
Katsumi Mima
克巳 美馬
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Nippon Chiko Co Ltd
Tokyo Electric Power Co Holdings Inc
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Nippon Chiko Co Ltd
Tokyo Electric Power Co Holdings Inc
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Abstract

To provide a buried object detection mechanism allowing efficiency and high accuracy of buried object detection work in trial drilling or drilling work and the buried object detection method of the same.SOLUTION: A trial drilling or a drilling work using a lifting motor and a rotary motor is provided and an accuracy of the buried object detection is improved by comparing and measuring pressure applied to the motor to be used and extracting pressure applied in a vertical direction at lower end of a cylindrical shell, when the pressure exceeds the preset value, the trial drilling or the drilling work is stopped. In addition, it is configured to send a signal for lifting the cylindrical shell to the lifting motor among the lifting motor and the rotary motor until the pressure is below than the preset value,and to execute the drilling again when it is below than the preset value and as it is possible to determine whether the buried object is present or not by a displacement amount from a stopped position, necessity of executing earth removal work for each reaction is removed and work efficiency is improved.SELECTED DRAWING: Figure 1

Description

本発明は、建柱等の用途のための穴を掘削する際に、地中埋設物の損傷を避けるための埋設物探知構造、及び埋設物探知方法に関するものである。  The present invention relates to a buried object detection structure and a buried object detection method for avoiding damage to underground objects when excavating holes for uses such as building columns.

建柱等の用途に用いる穴の掘削は、主にオーガ車やバックホウなどの重機を用いて行われている。しかしながら、これらの重機による掘削作業において、オーガの刃やバックホウの先端等で地中の埋設物（ガス管、水道管等）を損傷させしまう虞がある。したがって、重機による埋設物の損傷を避けるべく、事前の試掘調査による埋設物の確認作業や、地中レーダを用いた埋設物探知作業が行われている。  The excavation of holes used for applications such as building pillars is mainly performed using heavy machinery such as an auger car and a backhoe. However, in excavation work by these heavy machinery, there is a risk of damaging underground objects (gas pipes, water pipes, etc.) with the blades of the auger or the tip of the backhoe. Therefore, in order to avoid damage to the buried object due to heavy machinery, a confirmation work of the buried object by a preliminary excavation survey and a buried object detection work using a ground penetrating radar are performed.

事前の試掘調査は、殆んど、作業員の手作業で行われており、探針棒やスコップ等の工具を使用しているが、その他にも、先端に高圧水を噴射するノズルを取り付けた探針棒を用いた試掘装置がある。この装置は、探針棒の先端が長尺管とその側方の複数個の短尺管から形成されており、それぞれに設けられたノズルから噴出される高圧水によって土壌を軟化させ、探針棒による試掘の適用深度の拡大と、作業性の向上を図ったものであった（特許文献１）。  Most of the preliminary drilling surveys are conducted manually by workers, and tools such as probe bars and scoops are used. In addition, a nozzle that injects high-pressure water is attached to the tip. There is a trial drilling device using a probe bar. In this device, the tip of the probe rod is formed of a long tube and a plurality of short tubes on its side, the soil is softened by high-pressure water ejected from nozzles provided on each tube, and the probe rod This was intended to increase the application depth of trial digging and improve workability (Patent Document 1).

また、地中探査レーダ装置は、送信アンテナと受信アンテナを別々の１組とし、装置の小型化を図り、埋設物からの反射波のみ正確に検出するため、埋設物からの反射波よりも振幅の大きい、アンテナと送信信号を発生する回路とのインピーダンス不整合などによる反射波と、地表面からの反射波を相殺する構成となっており、レーダによる探査精度の向上を図ったものであった（特許文献２）。  In addition, the underground exploration radar device has a transmitting antenna and a receiving antenna as separate sets to reduce the size of the device and accurately detect only the reflected wave from the buried object, so that the amplitude is larger than the reflected wave from the buried object. The structure is designed to cancel the reflected wave from the ground and the reflected wave due to impedance mismatch between the antenna and the circuit that generates the transmission signal, and to improve the search accuracy by the radar. (Patent Document 2).

尚、従来技術からの作業性向上を図った技術として、掘削排土装置、及びその方法がある。この方法は、円筒状の内管と該内管に沿って噴射される流体とにより土壌の掘削を行い、円筒状の内管を押込む力が埋設物に損傷を与えない程度に調整し、掘削するものであった。そして、地中に埋設物が存在する場合であっても試掘調査作業を省略するものであった（特許文献３）。  As a technique for improving workability from the prior art, there is an excavation and earthing device and its method. This method excavates the soil with a cylindrical inner pipe and a fluid sprayed along the inner pipe, and adjusts the force to push the cylindrical inner pipe so as not to damage the buried object, It was to be excavated. And even if a buried object exists in the ground, the trial excavation work is omitted (Patent Document 3).

特開２００８−２３１７８１公報JP 2008-231781 A 特開２０００−３４６９５４公報JP 2000-346554 A 特開２００９−２６４０６７公報JP 2009-264067 A

特許文献１並びに特許文献２に示されたものは、何れも従来の作業員の手作業による試掘調査と比較して、作業効率及び探査精度の向上が期待できるが、しかし、これらの試掘調査作業は、建柱等の用途に用いる穴の掘削作業の事前工程であり、施工現場には試掘調査用の建柱等の用途に用いる穴の掘削作業用の車両及び作業員が繰返し立ち入る必要がある。そのため、全体工程の長期化や周辺住民への第三者迷惑発生の問題を生じ、作業効率の低下や周辺環境への影響などの課題が発生することになる。  Both of Patent Document 1 and Patent Document 2 can be expected to improve work efficiency and exploration accuracy as compared to conventional manual drilling surveys by workers. Is a preliminary process of excavation work for holes used for building pillars, etc., and it is necessary to repeatedly enter vehicles and workers for excavation work for holes used for construction works such as building pillars for exploration surveys. . As a result, the entire process becomes longer and the problem of third-party inconvenience to neighboring residents arises, resulting in problems such as reduced work efficiency and impact on the surrounding environment.

特許文献３に開示されている掘削排土装置の荷重検出センサは、円柱管体が掘削する深度が深くなるにつれ、円筒状の内管の下端で検出する荷重だけでなく、円筒状の内管の周面からの荷重も検出するため、昇降センサにはそれぞれの荷重の合力が伝達されることになる。したがって、円筒状の内管下端に荷重がかかっていない場合でも、円筒状の内管周面の荷重のみで設定器で設定した設定値を超えた場合、埋設物が有ると判断するため、実際の掘削している位置に埋設物が存在していなくとも、掘削が停止してしまう場合があった。  The load detection sensor of the excavation and earthing device disclosed in Patent Document 3 is not limited to the load detected at the lower end of the cylindrical inner pipe as the depth of excavation of the cylindrical pipe body increases, but also the cylindrical inner pipe Therefore, the resultant force of each load is transmitted to the lift sensor. Therefore, even when no load is applied to the lower end of the cylindrical inner pipe, if the set value set by the setting device is exceeded only with the load on the circumferential surface of the cylindrical inner pipe, it is determined that there is an embedded object. In some cases, excavation stopped even if there was no buried object at the excavation position.

また、特許文献３に開示されている掘削排土装置は、荷重検出センサの反力が設定器の設定値を超えた場合、その位置で掘削が停止される。そして、掘削が停止された位置までの掘削土砂を排土した上で、埋設物か否かの目視確認を行い、礫などの支障物であった場合は、掘削位置から取り除き、再び、予定深度までの掘削を行う必要があった。  Further, when the reaction force of the load detection sensor exceeds the set value of the setting device, the excavation and earthing device disclosed in Patent Document 3 stops excavation at that position. Then, after excavating the excavated soil up to the position where excavation was stopped, visually check whether it is a buried object, and if it is an obstacle such as gravel, remove it from the excavation position, and again the expected depth There was a need to drill until.

そして、特許文献３に開示されている掘削排土装置は、掘削位置の地盤に支障物が多く混在している場合、掘削装置が支障物に接触する度に、掘削土砂の排土作業と目視確認を繰返すことになり、該掘削排土装置の使用可能な地盤が限定され、作業効率も著しく低下してしまうという欠点があった。  And when the excavation earthing device currently indicated by patent documents 3 has many obstructions mixed in the ground of an excavation position, every time an excavation device contacts obstructions, excavation earth removal work and visual inspection are carried out. Since the confirmation is repeated, the ground that can be used for the excavation and earthing device is limited, and the work efficiency is significantly reduced.

本発明は、上記の事情を鑑みて、試掘又は掘削作業における埋設物探知作業の効率化及び高精度化を可能とした埋設物探知構造、及び埋設物探知方法を提供するものである。  In view of the above circumstances, the present invention provides a buried object detection structure and a buried object detection method capable of improving the efficiency and accuracy of a buried object detection work in a trial or excavation work.

本発明の掘削排土装置における埋設物探知構造は、内管の下先端部側の掘削用の噴射ノズルから流体を噴射させて土砂を掘削するために、該内管の周面に掘削用の噴射管が取付けられ、その内管を回転させる為の回転モータが支持基台に設置されると共に前記内管でなる円柱管体をも前記支持基台に設置し、該支持基台が昇降される支柱体には、支持基台を昇降する昇降モータが設置されて、円柱管体を昇降させる掘削排土装置において、昇降モータの動作圧力から掘進時の円柱管体底面に作用する鉛直方向の圧力、及び内管周面に作用する周面摩擦力の合力を把握する昇降センサと、回転モータの動作圧力から回転時の回転方向の摩擦力を把握する回転センサと、該昇降センサ及び該回転センサから円柱管体の底面で感知する鉛直方向の圧力相当分のみを反力として抽出する抽出手段と、埋設物などがある為に昇降モータや回転モータにかかる負荷を止めるために必要とする停止の基準となる反力を予め設定する設定器と、抽出された鉛直方向の圧力である反力が設定器で設定された埋設物などがある為に生じる停止の基準となる反力と比較して判定する演算処理装置とでなり、該演算処理装置によって、抽出された鉛直方向の圧力でなる反力が設定器による停止の基準となる反力より高いか、低いかを判定し、埋設物の有無の判断がされるものである。  The buried object detection structure in the excavation and earthing device of the present invention is used for excavation on the peripheral surface of the inner pipe in order to excavate the soil by injecting fluid from the injection nozzle for excavation on the lower tip side of the inner pipe. An injection pipe is attached, a rotation motor for rotating the inner pipe is installed on the support base, and a cylindrical tube body made of the inner pipe is also installed on the support base, and the support base is raised and lowered. In the excavation and earthing device for raising and lowering the cylindrical tube body, a vertical motor acting on the bottom surface of the cylindrical tube body during excavation is installed in the excavation and earthing device for raising and lowering the cylindrical tube body. Lift sensor for grasping pressure and resultant force of peripheral friction force acting on inner pipe circumferential surface, rotation sensor for grasping friction force in rotation direction during rotation from operating pressure of rotary motor, lift sensor and rotation Vertical pressure sensed from the sensor at the bottom of the cylindrical tube An extraction means for extracting only a corresponding amount as a reaction force, and a setting device for presetting a reaction force that is a reference for a stop required to stop a load applied to a lifting motor or a rotation motor because there is an embedded object, An arithmetic processing unit for determining a reaction force, which is an extracted vertical pressure, by comparing with a reaction force that is a reference for stopping due to a buried object set by a setting device. Thus, it is determined whether the reaction force, which is the extracted vertical pressure, is higher or lower than the reaction force that is a reference for stopping by the setting device, and the presence / absence of an embedded object is determined.

本発明の掘削排土装置における埋設物探知構造は、抽出された鉛直方向の圧力である反力が、設定器に設定された埋設物などがある為に生じる停止の基準となる反力と比較して掘進か、停止かの判断をする演算処理装置と、鉛直方向の圧力である反力が設定器による設定値より高い場合には一時停止し、昇降モータの逆転により円柱管体を少し上昇させる動力制御盤と、円柱管体が少し上昇した為に円柱管体の鉛直方向の圧力が設定器による設定値より下がる為、昇降モータを駆動させる昇降切換制御弁と、これらの手段が繰返される過程の回数を計数するカウンターと、決められた数回の繰返し回数になったときには、円柱管体の測定された掘進の変位量が微少である場合は、埋設物有りと見做し、完全な停止をする距離センサ装置とからなり、埋設物の有無が判断されるものである。  The buried object detection structure in the excavation and earthing device of the present invention compares the reaction force, which is the extracted vertical pressure, with the reaction force that is a reference for stopping that occurs due to the existence of the buried object set in the setting device. Then, if the reaction force, which is the pressure in the vertical direction, is higher than the set value by the setting device, it temporarily stops and lifts the cylindrical tube slightly by reversing the lifting motor. The power control panel to be operated, the vertical pressure of the cylindrical tube body is lowered from the set value by the setting device because the cylindrical tube is slightly raised, and the lift switching control valve for driving the lifting motor and these means are repeated. When a counter that counts the number of processes and a predetermined number of repetitions, if the measured displacement of the cylindrical tube is very small, it is considered that there is a buried object and is completely From the distance sensor device to stop Ri, in which the presence of buried object is determined.

本発明の掘削排土装置における埋設物探知方法は、内管の下先端部側の掘削用の噴射ノズルから流体を噴射させ土砂を掘削するために、該内管の周面に掘削用の噴射管が取付けられ、その内管を回転させる為の回転モータが支持基台に設置されると共に前記内管でなる円柱管体をも前記支持基台に設置し、該支持基台が昇降される支柱体には、支持基台を昇降する昇降モータが設置されて、円柱管体を昇降させる掘削排土装置において、昇降モータにより円柱管体を降下させる際にかかる円柱管体の底面に作用する鉛直方向の圧力、及び円柱管体周面に作用する周面摩擦力の合力を把握し、回転モータの動作圧力から回転方向の摩擦力を把握しているが、円柱管体底面に作用する鉛直方向の圧力のみを反力として抽出し、設定器により、埋設物などがある為に昇降モータに負荷がかかり、それを止めるために必要とする停止の基準となる反力の設定を予め行っておき、よって、演算処理装置により、鉛直方向の圧力が設定器によって設定された反力より高いか、低いかを判定して埋設物の有無の判断がされる方法である。  The buried object detection method in the excavation and earthing device of the present invention is a method for injecting excavation on the peripheral surface of an inner pipe in order to excavate soil by injecting a fluid from an injection nozzle for excavation on the lower tip side of the inner pipe. A pipe is attached, a rotary motor for rotating the inner pipe is installed on the support base, and a cylindrical tube body made of the inner pipe is also installed on the support base, and the support base is raised and lowered In the excavation and earthing device for lifting and lowering the cylindrical tube body, the column body is provided with a lifting motor for lifting and lowering the support base, and acts on the bottom surface of the cylindrical tube body when the cylindrical tube body is lowered by the lifting motor. While grasping the pressure in the vertical direction and the resultant force of the peripheral frictional force acting on the cylindrical tube circumferential surface, the frictional force in the rotational direction is grasped from the operating pressure of the rotary motor, but the vertical acting on the cylindrical tube bottom surface Only the pressure in the direction is extracted as a reaction force and buried by the setting device For example, the lifting motor is loaded, and the reaction force that is the reference for stopping to stop it is set in advance, so the vertical pressure is set by the setting device by the arithmetic processing unit. In this method, it is determined whether there is an embedded object by determining whether the reaction force is higher or lower than the set reaction force.

本発明の掘削排土装置における埋設物探知方法は、建柱穴等の掘削中に抽出した鉛直方向の反力が、設定器によって予め設定した設定値を超えると円柱管体の掘進を停止し、直後に円柱管体を少し上昇させ、上昇させることによって計測する反力が設定値以下となるので再び掘進する作業を行い、この作業を複数回繰返し、繰返した結果、距離センサによって、掘進を再度開始した個所から掘進を停止した個所までの変位量が微少であったとき、その個所に埋設物が存在すると判断し、掘進を完全停止する方法である。  The method for detecting an embedded object in the excavation and earthing device of the present invention stops the excavation of a cylindrical tube when the vertical reaction force extracted during excavation of a pillar hole or the like exceeds a preset value set by a setting device. Immediately after that, the cylinder tube is raised slightly, and the reaction force to be measured becomes lower than the set value by raising the cylinder tube, so work to dig again and repeat this work several times. In this method, when the amount of displacement from the location where the excavation is stopped to the location where the excavation is stopped is very small, it is determined that there is an embedded object at that location and the excavation is completely stopped.

本発明の掘削排土装置における埋設物探知構造、及び埋設物探知方法は、埋設物からの反力の計測方法を、昇降モータ及び回転モータから計測される圧力を比較し、円筒状の内管下端部で作用する圧力のみを抽出することを可能としたため、周面摩擦力の影響で埋設物が存在しない位置での埋設物探知構造の誤作動の可能性を排除し、埋設物探知構造の誤作動によって生じうる排土作業や目視確認の作業を行う必要がないため、試掘及び掘削作業の作業効率を向上させることが可能である。  The buried object detection structure and the buried object detection method in the excavation and earthing device according to the present invention are a method for measuring a reaction force from a buried object, a pressure measured by a lift motor and a rotary motor, and a cylindrical inner pipe Since it is possible to extract only the pressure acting at the lower end, the possibility of malfunction of the buried object detection structure at the position where no buried object exists due to the influence of the peripheral frictional force is eliminated, and the buried object detection structure Since there is no need to perform earth removal work or visual confirmation work that may occur due to malfunction, it is possible to improve the work efficiency of the test and excavation work.

本発明の掘削排土装置における埋設物探知構造、及びその埋設物探知方法は、掘削排土装置が、流体を利用した掘削方法を採用しているため、埋設物探知構造が、埋設物又は支障物を探知した場合、円筒状の内管の昇降を複数回繰返すことにより、単体の支障物である場合、流体の効果で支障物を掘削進路から除外し、掘進を停止した位置から掘進を再開することが可能である。また、地中に連続して存在する埋設管等である場合は、流体の効果によって位置が殆んど変化しないため、埋設物探知構造は、同一の位置において掘進と停止を繰返すだけでよい。したがって、埋設物探知構造が複数回反応を示した場合、掘進の変位量に変化がある場合は支障物と見做し、掘進の変位量に変化がない場合は埋設物と判断できるため、支障物に接触した場合の排土作業を行う必要がなくなり、作業性の向上が可能である。  The buried object detection structure and the buried object detection method in the excavation and excavation apparatus according to the present invention employ the excavation method using a fluid in the excavation and earthing apparatus, so that the buried object detection structure is buried or obstructed. When an object is detected, the cylindrical inner pipe is repeatedly raised and lowered several times, so if it is a single obstacle, the obstacle is removed from the excavation path due to the effect of the fluid, and the excavation is resumed from the position where the excavation was stopped. Is possible. Further, in the case of a buried pipe or the like that exists continuously in the ground, the position hardly changes due to the effect of the fluid, and therefore the buried object detection structure only needs to repeat excavation and stop at the same position. Therefore, if the buried object detection structure responds multiple times, it can be regarded as an obstacle if there is a change in the excavation displacement amount, and if there is no change in the excavation displacement amount, it can be judged as an embedded object. There is no need to perform earth removal work when it comes in contact with an object, and workability can be improved.

本発明において、埋設物の探知は円柱管体と埋設物が実際に接触した際の反力からその有無を判断しているため、地中の埋設物もしくは支障物を確実に発見することが可能であり、また、円柱管体下端部に搭載されている排土構造によって、埋設物の疑いがある場合、その上部の土を排土することが可能であるため、実際に埋設物が存在しているかどうかの確認を目視で容易に行うことが可能になっている。  In the present invention, since the detection of the buried object is judged from the reaction force when the cylindrical tube body and the buried object actually contact each other, it is possible to reliably find the buried object or obstacle in the ground. In addition, if there is a suspicion of a buried object due to the soil removal structure installed at the lower end of the cylindrical tube body, it is possible to remove the soil above it, so there is actually a buried object. It is possible to easily check visually whether or not the

本発明は、任意で反力の設定値及び降下速度の調整を行えば、その後は昇降モータ及び回転モータを駆動させ、埋設物探知構造を作動させながら試掘及び掘削作業を行うことが可能である。したがって、試掘及び掘削時における重機の操作技術や埋設探査技術などの専門的な技術が必要なくなり、工期の短縮も図れるため、作業効率の向上及び周辺環境への影響の低減が可能である。  In the present invention, if the reaction force set value and the descent speed are adjusted arbitrarily, then the lifting and rotating motors are driven, and the test and excavation work can be performed while operating the buried object detection structure. . This eliminates the need for specialized techniques such as heavy machinery operation techniques and burial exploration techniques during trial digging and excavation, and shortens the construction period, thereby improving work efficiency and reducing the impact on the surrounding environment.

掘削排土装置の動力制御のブロック図である。  It is a block diagram of power control of an excavation earthing device. 掘削排土装置の円柱管体の概略縦断面図である。  It is a schematic longitudinal cross-sectional view of the cylindrical pipe body of an excavation earthing device. 埋設物探知構造（実施例１）のフローチャートである。  It is a flowchart of a buried object detection structure (Example 1). 埋設物探知構造（実施例２）のフローチャートである。  It is a flowchart of a buried object detection structure (Example 2).

本発明の掘削排土装置の動力制御は、図１に示す如く、掘削排土する円柱管体１と、該円柱管体の内管を回転させる回転モータ２と、それを設置する支持基台３と、該支持基台を昇降させ、円柱管体１を昇降させる昇降モータ４と、該昇降モータを設置する支柱体５とでなる掘削排土装置Ａと、回転モータ２の動作圧力から摩擦力を把握する回転センサ６、昇降モータ４の動作圧力から鉛直方向の圧力及び周面摩擦力の合力を把握する昇降センサ７、これらを調整するレギュレータ６１，７２、停止の基準となる反力の設定をする設定器８、該設定器で設定された設定値に基いて、掘進か、停止かを判断する演算処理装置９、該演算処理装置の判断を受けて動力制御をする動力制御盤１０でなる制御装置ａと、該動力制御盤よりの指令で切換えられる回転方向切換電磁弁２０及び昇降切換電磁弁３０、回転センサ６、昇降センサ７でなる動力ユニットｂでなる動力制御装置Ｂとで構成されている。  As shown in FIG. 1, the power control of the excavation and earthing device according to the present invention includes a cylindrical tube 1 for excavating and excavating, a rotary motor 2 for rotating an inner tube of the cylindrical tube, and a support base on which the rotary motor 2 is installed. 3, excavating and discharging apparatus A composed of elevating motor 4 for elevating and lowering the cylindrical base body 1 and elevating motor 4 for elevating the cylindrical tube 1, and a column body 5 for installing the elevating motor, A rotation sensor 6 for grasping the force, a lift sensor 7 for grasping the resultant force of the vertical pressure and the peripheral frictional force from the operating pressure of the lift motor 4, regulators 61 and 72 for adjusting them, and a reaction force as a reference for stopping A setting unit 8 for setting, a processing unit 9 for determining whether to dig or stop based on a setting value set by the setting unit, and a power control panel 10 for performing power control upon receiving the determination of the processing unit Switching between the control device a and the command from the power control panel Rotation direction switching solenoid valve 20 and the lift switching solenoid valve 30 is, the rotation sensor 6, and a as a power control unit B in the power unit b comprising at lift sensor 7.

そして、動力制御は、
１．設定器８で停止の基準となる反力の設定を行う。
２．昇降モータ４と回転モータ２が作動することで掘進を開始する。
３．掘進中に埋設物があり、昇降モータ４や回転モータ２に負荷がかかり、センサ６、７ を通じて演算処理装置９で「設定された反力」の値をもとに、停止か、掘進か、判断 される。
４．演算処理装置９で停止と判断されると、昇降モータ４を作動させて円柱管体１を上昇 （数ｃｍ程度）させる。
５．負荷が軽減された時点で掘進を再開する。
６．３〜５の工程を複数回繰返す。掘進を再開したとき、停止位置からの掘進の変位量が 微少の場合は埋設物である可能性が高く、支障なく掘進が可能であれば礫などの支障 物であったと判断することが可能である。
７．３〜６の工程を経て目標深度までの掘削を実施する。And power control is
1. The setting device 8 sets a reaction force that is a reference for stopping.
2. The excavation is started when the elevating motor 4 and the rotary motor 2 are operated.
3. There is a buried object during the excavation, and a load is applied to the elevating motor 4 and the rotary motor 2. Judged.
4). If it is determined by the arithmetic processing unit 9 to be stopped, the elevating motor 4 is actuated to raise the cylindrical tube body 1 (about several cm).
5). Resume digging when the load is reduced.
6. Repeat steps 3-5 multiple times. When excavation is resumed, if the displacement of the excavation from the stop position is very small, it is highly possible that the excavation is buried. is there.
7. Excavate to the target depth through steps 3-6.

掘削排土装置の円柱管体１は、図２に示す如く、内管１１に、土砂保持装置１２を収納し、該内管を回転させると共に、該内管に設けられた掘削用噴射管１３へ流体を送り、掘削用ノズル１４より噴射して土砂を掘削し、掘削完了後には、掘削用噴射ノズル１４の流体の噴射を止め、内管１１に設けられた切断用噴射管１５へ流体を送り、切断用噴射ノズル１６より流体を噴射し、土砂保持装置１２の軸方向を横断する方向に土砂保持装置１２の土砂を切断し、内管１１に設けられた注入管１７へ流体を送り、該注入管より流体を膨張体１８へ送り、該膨張体を膨張させ、膨張体より切断用噴射ノズル１６からの流体の噴射で切断した土砂を保持し、内管１１を地上側へ引き上げ、内管１１内の土砂を排土するものである。  As shown in FIG. 2, the cylindrical tube body 1 of the excavation and earthing device houses an earth and sand holding device 12 in an inner tube 11, rotates the inner tube, and also uses a drilling injection tube 13 provided on the inner tube. The fluid is fed to the digging nozzle 14 to excavate the earth and sand, and after the digging is completed, the blasting jet nozzle 14 stops spraying the fluid, and the fluid is fed to the cutting jet pipe 15 provided in the inner pipe 11. The fluid is ejected from the spray nozzle 16 for feeding and cutting, the earth and sand of the earth and sand holding device 12 is cut in a direction crossing the axial direction of the earth and sand holding device 12, and the fluid is sent to the injection pipe 17 provided in the inner pipe 11, The fluid is sent from the injection pipe to the expansion body 18, the expansion body is expanded, the earth and sand cut by the injection of the fluid from the cutting injection nozzle 16 is held from the expansion body, the inner pipe 11 is pulled up to the ground side, The earth and sand in the pipe 11 is discharged.

埋設物探知構造は、図３に示す如く、昇降モータ４の動作圧力から掘削時の円柱管体１底面に作用する鉛直方向の圧力、及び内管１１の周面に作用する周面摩擦力の合力を把握する昇降センサ７と、回転モータ２の動作圧力から回転時の回転方向の摩擦力を把握する回転センサ６と、該昇降センサ及び該回転センサから円柱管体１の底面で感知する鉛直方向の圧力相当分５０のみを反力として抽出する抽出手段４０と、埋設物などがある為に昇降モータ４や回転モータ２にかかる負荷を止めるために必要とする停止の基準となる反力を予め設定する設定器８と、抽出された鉛直方向の圧力である反力が設定器８で設定された埋設物などがある為に生じる停止の基準となる反力と比較して判定する演算処理装置９とでなり、該演算処理装置によって、抽出された鉛直方向の圧力でなる反力が設定器８により停止の基準となる反力より高いか、低いかを判定し、埋設物の有無を判断がされるものである。  As shown in FIG. 3, the buried object detection structure includes a vertical pressure acting on the bottom surface of the cylindrical tube body 1 during excavation and a peripheral friction force acting on the peripheral surface of the inner tube 11 from the operating pressure of the lifting motor 4. A lift sensor 7 for grasping the resultant force, a rotation sensor 6 for grasping the frictional force in the rotational direction during rotation from the operating pressure of the rotary motor 2, and a vertical sensed on the bottom surface of the cylindrical tube 1 from the lift sensor and the rotation sensor. The extraction means 40 that extracts only the pressure equivalent 50 in the direction as a reaction force, and the reaction force that serves as a reference for the stop required to stop the load applied to the lift motor 4 and the rotary motor 2 because there are buried objects, etc. Arithmetic processing for determining a setting device 8 set in advance and a reaction force that is an extracted vertical pressure compared with a reaction force that is a reference for stopping due to a buried object or the like set by the setting device 8 And the arithmetic processing unit. Te, or reaction force made by the pressure of the extracted vertical direction higher than the reaction force as a reference of stopping the setter 8, lower or determined, are those that determine the presence or absence of buried objects.

その埋設物探知方法は、昇降センサ７、回転センサ６から抽出手段４０で、円柱管体１底面に作用する鉛直方向の圧力のみを反力として抽出し、設定器８により、埋設物などがある為に昇降モータ４に負荷がかかり、それを止めるために必要とする停止の基準となる反力の設定を予め行っておき、よって、演算処理装置９により鉛直方向の圧力が設定器８によって設定された設定値より高いか、低いかを判定して、埋設物の有無の判断をする方法である。  The embedded object detection method uses the extraction means 40 from the lift sensor 7 and the rotation sensor 6 to extract only the vertical pressure acting on the bottom surface of the cylindrical tube 1 as a reaction force, and there is an embedded object by the setting device 8. Therefore, a load is applied to the elevating motor 4 and a reaction force that is a reference for stopping to stop the lifting motor 4 is set in advance, so that the vertical pressure is set by the setting device 8 by the arithmetic processing unit 9. This is a method of determining whether there is an embedded object by determining whether it is higher or lower than the set value.

埋設物探知構造は、図４に示す如く、抽出手段４０で抽出された鉛直方向の圧力である反力５０が設定器８に設定された埋設物などがある為に生じる停止の基準となる反力と比較して掘進か、停止かの判断をする演算処理装置９と、鉛直方向の圧力である反力が設定器８による設定値より高い場合には一時停止５２し、昇降モータ４の逆転により円柱管体１を少し上昇させる動力制御盤１０と、円柱管体１が少し上昇した為に円柱管体の鉛直方向の圧力が設定器８による設定値より下がる為、昇降モータ４を駆動させる昇降切換制御弁３０と、これらの手段が繰返される過程の回数を計側するカウンター６０と、決められた数回の繰返し回数になったときには、円柱管体１の測定された掘進の変位量が微少である場合は埋設物ありと見倣し、完全な停止をする距離センサ装置７０とからなり、埋設物の有無が判断されるものである。  In the buried object detection structure, as shown in FIG. 4, the reaction force 50, which is the vertical pressure extracted by the extraction means 40, becomes a reference for stopping that occurs when there is an buried object set in the setting device 8. The arithmetic processing unit 9 that determines whether to dig or stop compared to the force, and when the reaction force, which is the pressure in the vertical direction, is higher than the set value by the setting device 8, temporarily stops 52 and reverses the lifting motor 4. Because of this, the power control panel 10 that slightly raises the cylindrical tube body 1 and the vertical pressure of the cylindrical tube body lower than the set value by the setting device 8 because the cylindrical tube body 1 is slightly lifted, so that the lifting motor 4 is driven. When the up / down switching control valve 30, the counter 60 that counts the number of times that these means are repeated, and the predetermined number of repetitions, the measured displacement amount of the cylindrical tube 1 is determined. If it is very small, imitate that there is a buried object, Made from the distance sensor device 70. for a total stop, in which the presence of buried object is determined.

この埋設物探知方法は、建柱穴等の掘削中に、抽出した鉛直方向の反力５０が演算処理装置９で設定器８によって予め設定した設定値を超えると円柱管体１の掘進を停止５２し、動力制御盤３０によって、直後に円柱管体１を少し上昇させ、上昇させることによって、昇降切換制御弁３０、昇降センサ７、演算処理装置９を介して、計測する反力が設定器８の設定値以下となるので再び掘進する作業を行い、この作業を複数回繰返し、繰返した結果、距離センサ７０によって、掘進を再度開始した個所から掘進を停止した個所までの変位量が微少であったとき、その個所に埋設物が存在すると判断し、掘進を完全に停止する方法である。  In this buried object detection method, when the extracted vertical reaction force 50 exceeds a preset value set by the setting device 8 in the arithmetic processing unit 9 during excavation of a pillar hole or the like, the excavation of the cylindrical tube body 1 is stopped. 52, the reaction force to be measured is set via the elevating switching control valve 30, the elevating sensor 7, and the arithmetic processing unit 9 by slightly raising and elevating the cylindrical tube body 1 immediately by the power control panel 30. Since it is less than the set value of 8, the excavation work is performed again, and this operation is repeated a plurality of times. As a result, the distance sensor 70 causes a slight displacement amount from the location where the excavation is restarted to the location where the excavation is stopped. When there is, it is judged that there is a buried object at that location, and the excavation is completely stopped.

Ａ 掘削排土装置
ａ 制御装置
Ｂ 動力制御装置
ｂ 動力ユニット
１ 円柱管体
１１ 内管
１２ 土砂保持装置
１３ 掘削用噴射管
１４ 掘削用噴射ノズル
１５ 切断用噴射管
１６ 切断用噴射ノズル
１７ 注入管
１８ 膨張体
２ 回転モータ
３ 支持基台
４ 昇降モータ
５ 支持体
６ 回転センサ
６１ レギュレータ
７ 昇降センサ
７１ レギュレータ
８ 設定器
９ 演算処理装置
１０ 動力制御盤
２０ 回転方向切換電磁弁
３０ 昇降切換電磁弁
４０ 抽出手段
５０ 鉛直方向の圧力
５１ 掘進
５２ 停止
６０ カウンター
７０ 距離センサ装置A Excavation and Soil Removal Device a Control Device B Power Control Device b Power Unit 1 Cylindrical Tube 11 Inner Tube 12 Sediment Holding Device 13 Excavation Injection Pipe 14 Excavation Injection Nozzle 15 Cutting Injection Pipe 16 Cutting Injection Nozzle 17 Injection Pipe 18 Expanding body 2 Rotating motor 3 Support base 4 Lifting motor 5 Supporting body 6 Rotating sensor 61 Regulator 7 Lifting sensor 71 Regulator 8 Setter 9 Arithmetic processing unit 10 Power control panel 20 Rotation direction switching solenoid valve 30 Lifting switching solenoid valve 40 Extraction means 50 Vertical pressure 51 Excavation 52 Stop 60 Counter 70 Distance sensor device

Claims (4)

内管の下先端部側の掘削用の噴射ノズルから流体を噴射させ土砂を掘削するために、該内管の周面に掘削用の噴射管が取付けられ、その内管を回転させる為の回転モータが支持基台に設置されると共に前記内管でなる円柱管体をも前記支持基台に設置し、該支持基台が昇降される支柱体には、支持基台を昇降する昇降モータが設置されて、円柱管体を昇降させる掘削排土装置において、昇降モータの動作圧力から掘進時の円柱管体底面に作用する鉛直方向の圧力、及び内管周面に作用する周面摩擦力の合力を把握する昇降センサと、回転モータの動作圧力から回転時の回転方向の摩擦力を把握する回転センサと、該昇降センサ及び該回転センサから円柱管体の底面で感知する鉛直方向の圧力相当分のみを反力として抽出する抽出手段と、埋設物などがある為に昇降モータや回転モータにかかる負荷を止めるために必要とする停止の基準となる反力を予め設定する設定器と、抽出された鉛直方向の圧力である反力が設定器で設定された埋設物などがある為に生じる停止の基準となる反力と比較して判定する演算処理装よる停止の基準となる反力より高いか、低いかを判定し、埋設物の有無の判断がされることを特徴とする掘削排土装置における埋設物探知構造。  In order to inject fluid from the excavation nozzle for excavation on the lower tip side of the inner pipe and excavate earth and sand, an excavation injection pipe is attached to the peripheral surface of the inner pipe, and rotation for rotating the inner pipe A motor is installed on the support base and a cylindrical tube body made of the inner pipe is also installed on the support base, and a lifting motor that raises and lowers the support base is provided on the support body on which the support base is raised and lowered. In the excavation and earth excavation device installed and lifted up and down the cylindrical tube body, the vertical pressure acting on the bottom surface of the cylindrical tube body during excavation from the operating pressure of the lifting motor and the peripheral friction force acting on the inner pipe circumferential surface Elevation sensor for grasping the resultant force, rotation sensor for grasping the frictional force in the rotational direction during rotation from the operating pressure of the rotary motor, and vertical pressure equivalent sensed from the elevation sensor and the bottom surface of the cylindrical tube body from the rotation sensor Extraction means for extracting only the reaction force as a reaction force and burial For example, there is a setter that pre-sets the reaction force that is the reference for stopping to stop the load applied to the lifting and rotating motors, and the reaction force that is the extracted vertical pressure is It is judged whether it is higher or lower than the reaction force that is the reference for stopping by the arithmetic processing equipment, which is judged by comparing it with the reaction force that becomes the reference for stopping due to the set buried object, etc. A buried object detection structure in an excavation and earthing device characterized by being judged. 抽出された鉛直方向の圧力である反力が、設定器に設定された埋設物などがある為に生ずる停止の基準となる反力と比較して掘進か、停止かの判断をする演算処理装置と、鉛直方向の圧力である反力が設定器による設定値より高い場合には一時停止し、昇降モータの逆転により円柱管体を少し上昇させる動力制御盤と、円柱管体が少し上昇した為に円柱管体の鉛直方向の圧力が設定器による設定値より下がる為、昇降モータを駆動させる昇降切換制御弁と、これらの手段が繰返される過程の回数を計数するカウンターと、決められた数回の繰返し回数になったときには、円柱管体の測定された掘進の変位量が微少である場合は、埋設物有りと見做し、完全な停止をする距離センサ装置とからなり、埋設物の有無が判断されることを特徴とする請求項１記載の掘削排土装置における埋設物探知構造。  An arithmetic processing unit that determines whether the extracted reaction force, which is vertical pressure, is digging or stopping compared to the reaction force that is the basis for stopping because there is an embedded object set in the setting device. When the reaction force, which is the pressure in the vertical direction, is higher than the value set by the setting device, the power control panel that temporarily stops and slightly raises the cylindrical tube body by reversing the lifting motor and the cylindrical tube body slightly rises. Because the vertical pressure of the cylindrical tube drops below the set value by the setter, the elevating switching control valve that drives the elevating motor, the counter that counts the number of times these means are repeated, and the predetermined number of times If the measured amount of excavation of the cylindrical tube is very small, it is considered that there is an embedded object, and it is composed of a distance sensor device that stops completely, and whether there is an embedded object. Is characterized by Buried object detection structure in the excavation soil discharge apparatus Motomeko 1 wherein. 内管の下先端部側の掘削用の噴射ノズルから流体を噴射させ土砂を掘削するために、該内管の周面に掘削用の噴射管が取付けられ、その内管を回転させる為の回転モータが支持基台に設置されると共に前記内管によってなる円柱管体をも前記支持基台に設置し、該支持基台が昇降される支柱体には、支持基台を昇降する昇降モータが設置されて、円柱管体を昇降させる掘削排土装置において、昇降モータにより円柱管体を降下させる際にかかる円柱管体の底面に作用する鉛直方向の力として抽出し、設定器により、埋設物などがある為に昇降モータに負荷がかかり、それを止めるために必要とする停止の基準となる反力の設定を予め行っておき、よって、演算処理装置により、鉛直方向の圧力が設定器によって設定された反力より高いか、低いかを判定して埋設物の有無の判断がされることを特徴とする掘削排土装置における埋設物探知方法。  In order to inject fluid from the excavation nozzle for excavation on the lower tip side of the inner pipe and excavate earth and sand, an excavation injection pipe is attached to the peripheral surface of the inner pipe, and rotation for rotating the inner pipe A motor is installed on the support base, and a cylindrical tube made of the inner pipe is also installed on the support base, and a lifting motor that raises and lowers the support base is provided on the support body on which the support base is raised and lowered. In the excavation and earth excavation equipment installed and lifted up and down the cylindrical tube, it is extracted as a vertical force acting on the bottom surface of the cylindrical tube when the cylindrical tube is lowered by the lifting motor, and the setter For example, the lifting motor is loaded, and the reaction force that is the reference for stopping to stop it is set in advance, so the vertical pressure is set by the setting device by the arithmetic processing unit. Higher or lower than the set reaction force Buried object detecting method in the excavated soil discharge apparatus characterized by either the determination of the presence or absence of determination to buried object to. 建柱穴等の掘削中に抽出した鉛直方向の反力が、設定器によって予め設定した設定値を超えると円柱管体の掘進を停止し、直後に円柱管体を少し上昇させ、上昇させることによって計測する反力が設定値以下となるので再び掘進する作業を行い、この作業を複数回繰返し、繰返した結果、距離センサによって、掘進を再度開始した個所から掘進を停止した個所までの変位量が微少であったとき、その個所に埋設物が存在すると判断し、掘進を完全停止することを特徴とする請求項３記載の掘削排土装置における埋設物探知方法。  When the vertical reaction force extracted during excavation of a pillar hole, etc. exceeds the preset value set by the setting device, the cylinder tube stops digging and immediately after that, the cylinder tube is slightly raised and raised. Since the reaction force measured by the below is less than the set value, repeat the work again, and repeat this work several times. As a result of the distance sensor, the distance from the location where the excavation was restarted to the location where the excavation was stopped is 4. The method for detecting a buried object in an excavation and earthing device according to claim 3, wherein when it is small, it is determined that there is a buried object at the location, and the excavation is completely stopped.
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